[AT] Air conditioning problems In my parts getter...

[Phil Auten]

OK, so if R134a is no longer blessed by the EPA, what is the preferred 
refrigerant for automotive use? I am not up on all of this as I haven't 
had to have an AC system repaired since about 2005.

Phil in TX

On 6/11/2021 10:35 PM, Brad Loomis wrote:
> I hope you meant a detector for the current refrigerants and not NH3. 
> Ammonia only requires your nose or a sulphur stick. And for those that 
> may want to try their hand at refrigeration, a lot of the newer 
> domestic/commercial units use either propane, R290 or isobutane R600a, 
> as refrigerant. I'm not sure what the automotive industry is going to 
> move to. I got out of commercial refrigeration not long after the 
> requirements to recover and the end of R12, R22, R502, R11, and the 
> rest of the chlorinated fluorocarbons.It was an awful time never 
> knowing what someone put into what system. Then came 410a in A/C. Now 
> that's going away. Customers didn't like to hear, we don't use that 
> refrigerant, we'll have to recover it, time consuming, and charge your 
> system with an EPA approved refrigerant, maybe have to change the oil, 
> etc, etc, equipment was slow so labor costs were absurd. Like I said, 
> ammonia is safe, easy, efficient, and well,  dangerous in the wrong 
> hands. :)
> And the bigger warning would be to never pressure test any system with 
> oxygen.
> And by this discussion it is apparent why automotive is the driving 
> force for EPA  to regulate what goes into the atmosphere. A billion 
> leaking autos is a lot of gas into the atmosphere. It just moved to 
> HVAC and refrigeration because of the same gasses.
>
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